Gartner Research

Benefits and Challenges of HCIS Stretched Clusters for Implementing HA and DR

Published: 14 November 2017

ID: G00336634

Analyst(s): Jerry Rozeman


Stretched hyperconverged clusters claim to create true active-active data center architectures for disaster recovery, disaster avoidance and load balancing in a single solution. Technical professionals can use this document to understand the benefits and limitations of stretched HCISs.

Table Of Contents


  • What Is a "Typical" Stretched Cluster and Do You Need One?
    • Active/Active Data Center Load Balancing or Workload Migration
    • Disaster Recovery Automation
  • How an HCIS Stretched Cluster Differs From a Traditional Stretched Cluster
    • Connectivity
    • Replication for HCIS Systems
    • Building an HCIS Stretched Cluster
    • Data Placement and Data Redundancy
    • Availability of Fault Domains
    • A Third Site and a Witness Component
    • Cluster Size
    • Network Bandwidth and Latency
    • VMware vSphere
    • Support
  • Analyzing the Use Cases
    • Active/Active Load Balancing Within and Between Data Centers
    • Disaster Recovery
    • Disaster Avoidance
  • Other Challenges of HCIS Stretched Clustering
    • Limited Vendor Support
    • Impact on Supported Features
  • Strengths
  • Weaknesses


The Details

  • Key Players
    • Dell EMC VxRail
    • HPE SimpliVity
    • Nutanix

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